The resurgent pop princess will perform a duet with Leon Jackson, one of two finalists to be mentored by her sister Dannii.
Kylie will also perform 'Wow', the second single from her X album, which is to be released in February.
Jackson won't be the only finalist to duet with a celebrity partner. Welsh opera diva Katherine Jenkins will sing alongside Rhydian Roberts, while Same Difference will be joined onstage by Minogue's former Neighbours colleague Jason Donovan.
The final of The X Factor airs Saturday at 7.15pm on ITV1.